Antauri/Nova (Why the heck do I keep writing this pairing?)
Truly, Antauri and Nova weren't as opposite as they appeared. She was fire, but you could hardly call him ice. There was a warmth behind every calm, stoic piece of wisdom he gave.
He was more accurately described as water, flowing through the tightest situations with a level of ease that could only come naturally. Even when warm, water was able to take the out of control rage from a fire, or let the fire make it even warmer.
And, most importantly, ice was the coldest form. Theoretically, ice could exist at absolute zero.
Ice could exist without fire.
Water would freeze over.